NEURONAL RESPONSES TO STATIC TEXTURE PATTERNS IN AREA-V1 OF THE ALERT MACAQUE MONKEY
NEURONAL RESPONSES TO STATIC TEXTURE PATTERNS IN AREA-V1 OF THE ALERT MACAQUE MONKEY
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DOI：
10.1152/jn.1992.67.4.961
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发表时间：
1992-04-01
影响因子：
2.5
通讯作者：
VANESSEN, DC
中科院分区：
文献类型：
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作者：
KNIERIM, JJ;VANESSEN, DC
1.我们记录的反应，从警觉猕猴的V1区神经元的纹理模式后，用于心理物理实验的弹出刺激建模。神经元的反应，一个单一的定向线段放置在一个细胞的经典感受野（CRF）进行了比较，其中的中心元素被完全放置在CRF外的元素环包围的反应。周围元素的方向要么与中心元素匹配，要么与中心元素正交，要么是随机的.纹理环绕的添加倾向于抑制对中心元素的响应，平均为34%。总的来说，在详细分析的122个细胞中，几乎80%的细胞被至少一种纹理环境显著抑制。细胞倾向于对中心和周围之间存在方向对比的刺激做出更强烈的反应，而不是对缺乏这种对比的刺激。平均差异为9%的响应，以最佳取向的中心元素单独。对于32%的细胞显示出统计学上显著的方向对比效应，平均差异为28%。一般抑制和方向对比效应都起源于中心条末端的环绕区域以及沿中心条两侧的沿着区域。随着纹理元素密度的降低，纹理包围引起的抑制量逐渐减小.一般抑制和方向对比效应都出现在对刺激的群体反应的早期。一般抑制效应大约需要7 ms才能产生，而方位对比效应需要18-20 ms才能产生。这些结果是一致的V1细胞在调解知觉弹出和纹理边界的隔离可能的功能作用。可能的解剖基板的影响进行了讨论。
1. We recorded responses from neurons in area V1 of the alert macaque monkey to textured patterns modeled after stimuli used in psychophysical experiments of pop-out. Neuronal responses to a single oriented line segment placed within a cell's classical receptive field (CRF) were compared with responses in which the center element was surrounded by rings of elements placed entirely outside the CRF. The orientations of the surround elements either matched the center element, were orthogonal to it, or were random.2. The addition of the textured surround tended to suppress the response to the center element by an average of 34%. Overall, almost 80% of the 122 cells analyzed in detail were significantly suppressed by at least one of the texture surrounds.3. Cells tended to respond more strongly to a stimulus in which there was a contrast in orientation between the center and surround than to a stimulus lacking such contrast. The average difference was 9% of the response to the optimally oriented center element alone. For the 32% of the cells showing a statistically significant orientation contrast effect, the average difference was 28%.4. Both the general suppression and orientation contrast effects originated from surround regions at the ends of the center bar as well as regions along the sides of the center bar.5. The amount of suppression induced by the texture surround decreased as the density of the texture elements decreased.6. Both the general suppression and the orientation contrast effects appeared early in the population response to the stimuli. The general suppression effect took approximately 7 ms to develop, whereas the orientation contrast effect took 18-20 ms to develop.7. These results are consistent with a possible functional role of V1 cells in the mediation of perceptual pop-out and in the segregation of texture borders. Possible anatomic substrates of the effects are discussed.